Heat Pump Electrical Load Calculator
Estimates heat-pump equipment VA, auxiliary-heat VA, total load, and panel current from nameplate MCA, auxiliary heat, voltage, and phase.
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Dwelling load, panel load, service size, NEC 220 demand, EV charger, heat pump, and generator load calculators.
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EV Charger Load Calculator
Estimate the panel or service load impact of one or more EVSE units using entered charger current, quantity, continuous-load factor, voltage, phase, existing load, and rating.
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Dryer Load Calculator
Estimate connected dryer load, demand-adjusted VA, and line current from entered nameplate rating, dryer quantity, demand factor, voltage, and phase.
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Appliance Load Calculator
Estimate appliance load and current from row-level VA, quantity, demand factors, continuous multipliers, voltage, phase, and an entered comparison capacity. The result does not apply dwelling, dryer, range, branch-circuit, or service demand rules.
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Demand Factor Estimate (NEC 220 Context)
Estimate demand from two user-defined load blocks, entered factor percentages, and an optional fixed allowance; NEC article references remain contextual.
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Residential Load Calculator
Enter the service voltage and four preliminary load estimates to calculate connected load, demand from the entered factor, current at the entered voltage, and diversity allowance. This transparent U.S. English model does not reproduce NEC demand rules or determine a compliant service size.
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Electrical Service Size Calculator
Use service voltage, phase count, a user-supplied real-power demand basis, power factor, and a target utilization percentage to create a transparent U.S. English preliminary service-size estimate. This calculator does not perform an NEC service calculation, service sizing, or code-compliant service-rating selection.
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Electrical Panel Load Calculator
Add three circuit load-current estimates to create a transparent preliminary estimate using the entered panel voltage, phase count, panel nameplate rating, and target reserve percentage.
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